Clustering by Fuzzy Neural Gas and Evaluation of Fuzzy Clusters
Figure 3
Final cluster solutions (a) and cost functions (b) for the Checkerboard data set using NG and PNG. (a) It can easily be verified that the PNG algorithm has more prototypes placed within the clusters than common NG. The number of training steps for both algorithms was the same. (b) The blue dots refer to the costs for Pulsing Neural Gas. The little bumps at time steps and indicate that a negative learning step has occurred.
